How to Avoid the Risk of Childhood Asthma During Pregnancy

How to Avoid the Risk of Childhood Asthma During Pregnancy

Childhood Asthma; Extra intake of fish oil during pregnancy might significantly reduce the risk of childhood asthma, according to a new study carried out by the Copenhagen Prospective Studies on Asthma in Childhood (COPSAC) research center in Denmark, in collaboration with the University of Waterloo, Canada.

The study, published by also claims that a weekly consumption of at least eight ounces of seafood by pregnant women seems to improve health outcomes in their infants. It suggested that supplements of the unsaturated fat might have an additional benefit as they may lower the risk of childhood asthma.

The researchers were led by Prof. Ken Stark, Canada Research Chair in Nutritional Lipidomics and professor in the Faculty of Applied Health Sciences at the University of Waterloo.

The health benefits of omega-3 fatty acids are well known and range from lowering the risk of heart disease to protecting cognitive function, it stated. Omega-3 fatty acids are one of the two major classes of polyunsaturated fat. They can be found in certain foods like flaxseed and fish, as well as in dietary supplements such as fish oil.

The report indicated that omega-3 fatty acids – when consumed directly from food, have a variety of health benefits. A moderate consumption of seafood has been shown to reduce the risk of cardiovascular disease and has also been associated with a reduced risk of cognitive decline, Alzheimer’s disease, and dementia.

How to Avoid the Risk of Childhood Asthma During Pregnancy

The Centers for Disease Control and Prevention (CDC) estimate that 6.3 million children in the United States (US) under the age of 18 – or 8.6 percent of all US children currently have asthma.

As the CDC report notes, the prevalence of asthma has increased in the US over the last decade, and the disease is currently at its highest level.

The authors of the new study hypothesised a link between the rising numbers of children affected by asthma in Western countries and the low levels of anti-inflammatory omega-3 in their diet. The researchers, therefore, examined the effect of omega-3 supplements in pregnant women on the risk of wheeze and asthma in their offspring.

Examining link between fish oil during pregnancy and childhood asthma Prof. Stark and team selected 736 pregnant women who were 24 weeks into the gestation period. They randomly administered some of the women a daily dose of 2.4 grams of n-3 long-chain polyunsaturated fatty acids (LCPUFA) in the form of fish oil.

The control group received a daily dose of olive oil as a placebo.

The LCPUFAs included eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). These can be found in cold-water fish and are crucial for regulating the human body’s immune response.

The researchers used rapid analytical techniques to measure EPA and DHA levels in the blood of pregnant women. Prof. Stark, who led the testing procedures, explains the benefits of using such a method. “Measuring the levels of omega-3 fatty acids in blood provides an accurate and precise assessment of nutrient status. Our labs are uniquely equipped to measure fatty acids quickly, extremely precisely, and in a cost-efficient manner.”

The mothers’ offspring formed the 2010 COPSAC cohort, and they were followed for five years – the age at which asthma can be clinically diagnosed.

During the five-year period, researchers monitored the children’s health for asthma and persistent wheeze, as well as respiratory tract infections, asthma complications, eczema, and sensitization to allergens.
In total, the clinical trial included 695 children, 95.5 percent of whom completed a three-year, double-blind follow-up period.

How to Avoid the Risk of Childhood Asthma During Pregnancy

The results were published in the New England Journal of Medicine. Omega-3 reduced childhood asthma risk by 31 percent. The results of the study seem to confirm the authors’ hypothesis.

“We have long suspected there was a link between the anti-inflammatory properties of long-chain omega-3 fats, the low intakes of omega-3 in Western diets and the rising rates of childhood asthma. This study proves that they are definitively and significantly related,” says Prof. Hans Bisgaard, first author.

The study revealed that pregnant women who took the daily dose of LCPUFA during the third trimester reduced their children’s risk of developing asthma or persistent wheeze by almost 31 percent. On how to check pregnancy, there are various methods which are 90% reliable.

The treatment group had a 16.9 percent risk of persistent wheeze or asthma, compared with 23.7 percent in the control group. This corresponds to a relative risk decrease of 30.7 percent.

The blood tests also revealed that the supplements most benefited the women who had low levels of EPA and DHA at the beginning of the study. The supplements reduced the risk of asthma in their children by 54 percent.

The N-3 LCPUFA supplements were also associated with a decreased risk of lower respiratory tract infections, but they did not seem to have any effect on asthma exacerbation, eczema, or allergic sensitization.

The authors highlight the contribution of their study to asthma treatment and prevention options.

“The proportion of women with low EPA and DHA in their blood is higher in Canada and the United States compared with Denmark. So we would expect an even greater reduction in risk among North American populations. While Identifying these women and providing them with supplements should be considered a front-line defense to reduce and prevent childhood asthma,” says Prof. Ken Stark.



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